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How are glucose molecules absorbed in the gut?

Food consists of many types of molecules, these are: polysaccharides (a chain of single molecular units); dissacharides (a pair of single molecular units) and monosaccharides (the individual units themselves...
AN
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What is the difference between meiosis and mitosis?

Function: Mitosis is used in the replication of body cells. It occurs every day to replace cells that have died or have been damaged, for growth and also in asexual reproduction. Meiosis is used to produce g...
AA
Answered by Amy A. • Biology tutor
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Why do mutations makes it difficult to create a vaccine ? (4 marks - has the potential to be worth more in an exam)

If the mutation rate is high then this can change the DNA composition of the cells. If the DNA changes then so do all the protiens in the cell. This is becauase DNA codes for all the protiens in the cell. Th...
MP
Answered by Muhammad P. • Biology tutor
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An enzyme catalyses only one reaction. Explain why.

Enzyme has a specific active site. Only one substrate will fit the active site.
AM
Answered by Amy M. • Biology tutor
8101 Views

Describe how insulin is secreted from beta cells in the Islets of Langerhans

Insulin is released in response to high blood glucose concentrations. High blood glucose concentrations means glucose is taken up by the beta-cells in the Islet's of Langerhans and is respired to produce ATP...
TD
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